London: Scientists claim to havefound the brain impulse which makes us all quit in the end --in fact, they have also pinpointed the precise part of thebrain which tells you when that time has arrived. A team at Duke University says that the impulse whichtold ancient foragers to give up on one pasture and move on tomore fertile hunting grounds is the same as that which urgespeople to try a different internet site if our initial choiceis taking too long to appear on screen.
Lead scientist Prof Michael Platt said: "It is as ifthere is a threshold for deciding it`s time to leave set inthe brain."The scientists also factored in the time it would taketo travel to the next food source and when this was increased,it took longer for the "quit" threshold to be reached. Prof Platt said that the findings tallied with a 1976evolutionary theory, the Marginal Value Theorem, which statedthat foragers would stay longer at a blackberry bush as thedistance between bushes became greater. The idea has been shown to hold true across the animalkingdom in worms, bees, fish and seals. Prof Platt said: "Thisis a really fundamental solution to a fundamental problem." He said that the same was true when it came to ouruse of modern technology. "In the case of internet users, thecost of travel time translates to download speed. The fasterthe downloads, the quicker browsers are willing to forageelsewhere," he said. PTI
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